Adds missing label status
Adds spec testing default status unselection

Checks that a user cannot unselect the default property of a status and
that the user can select the default property of a non-default status.
Prevent default selection for default status
Adds changelog entry
object-daddy: Use Gem instead of Git repository
speed-improvements for the project-association-lookup.
Merge pull request #540 from opf/fix/use_object_daddy_gem

object-daddy: Use Gem instead of Git repository
fixed the child-id-selector to make the tests run
Introducing a very rudimentary api for looking up users.

Still needs some security (when is a user allowed to be seen etc.), and
needs some serious testing, but at least it returns the
firstname,lastname for a given set of ids.
adde the name to the users-api
Merge pull request #531 from opf/fix/unselect_default_work_package_status

[FIX] Unselect default work package status
Merge remote-tracking branches 'opf/feature/rails3' and 'opf/feature/migrate_api_views_to_rabl' into fix/timelines-api-migration
Restores parents and grouping in timelines.